Got a new freqency counter, the Fluke PM6690. First, it is also about Spectracom/Pendulum CNT-90 and also about Tektronix FCA3000. These counters are actually relabeled Pendulum CNT-90.
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View 500MHz on Tektronix TDS380
This is how the old good Tektronix TDS380 acquires a 500MHz signal from Marconi Instruments 2031 signal generator. Very stable, calm trigger and display. No jumping around, albeit using 16x averaging.
Continue reading “View 500MHz on Tektronix TDS380”Max freq of test equipment
Many measuring devices have a maximum frequency up to which they work correctly, as stated by the manufacturer. Above that frequency they don’t just stop working, rather they still have a range above where they still may work correctly, just aren’t as sensitive. Many oscilloscopes, for example, can work up to twice their bandwidth, but the measured amplitudes are not more than some random numbers. You can still see the waveform, but not do any meaningful measurements.
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